Ornis Polonica 2021, 62: 1–17
Diet of the Golden Eagle Aquila chrysaetos in the Polish part of the Carpathians in 2000–2019
Marian Stój, Robert Kruszyk
Ornis Polonica 2021, 62: 17–29
The effect of active nest protection on the productivity of the Montagu’s Harrier Circus pygargus
Tomasz Przybyliński, Krzysztof Myśliwiec
Ornis Polonica 2021, 62: 30–48
The first record of the Savannah Sparrow Passerculus sandwichensis in Poland and the occurrence of Nearctic passerines in the Western Palearctic
Arkadiusz Sikora, Waldemar Półtorak
Ornis Polonica 2021, 62: 49–59
Abundance and distribution of the Hazel Grouse Tetrastes bonasia in the Tatra National Park
Marcin Matysek, Robert Gwiazda, Bogusław Binkiewicz, Grzegorz Szewczyk
Ornis Polonica 2021, 62: 60–73
Detectability of the Magpie Pica pica during the breeding season in urban habitats – recommendations for the population monitoring
Kamil Kaczmarek
Ornis Polonica 2021, 62: 74–79
Abundance and distribution of the Boreal Owl Aegolius funereus in the Bydgoszcz Forest in 2020
Rafał Kurowski
Ornis Polonica 2021, 62: 79–82
The second record of the American Golden Plover Pluvialis dominica in Poland
Zbigniew Kajzer, Sławomir Rubacha
Ornis Polonica 2021, 62: 83–85
Cofta T. 2020. Flight identification of European passerines and select landbirds. Princeton University Press. ISBN 978-0-691-17757-1
Tadeusz Stawarczyk
Ornis Polonica 2021, 62: 85–87
Balatski N. 2020. Gniazda ptaków Syberii. Nowosybirsk. ISBN 978-5-93889-384-9
Józef Hordowski
